Eragrostis infecunda

Eragrostis infecunda J. M. Black. Trans. & Proc. Roy. Soc. South Australia 55: 137, fig. 4 (1931). Classification. (GPWG 2001) : Subfamily Chloridoideae. Cynodonteae.

Type of Basionym or
Protologue Information
: Along the Gilbert and Wakefield Rivers
near Riverton, Worsley Johnston s.n..

Key references
(books and floras):
[2002] D.Sharp & B.K.Simon, AusGrass, Grasses of
[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia

[2006] J.Jessop, G.R.M.Dashorst, F.M.James, Grasses of South Australia  (372, fig. 302).

Perennial. Rhizomes present, elongated. Stolons present. Culms erect, 35–70 cm
tall. Lateral branches simple or sparsely branched. Ligule a fringe of hairs,
0.3–0.5 mm long. Leaf-blades straight, flat or involute or convolute, 3–8 cm
long, 1–2 mm wide. Leaf-blade surface smooth, glabrous.

Inflorescence compound, a panicle or a panicle. Panicle lanceolate or elliptic,
dense, 6–10 cm long, 2–4 cm wide.

Spikelets pedicelled. Fertile spikelets many flowered, with at least 2 fertile
florets (5–11), comprising 5–11 fertile floret(s), with diminished florets at
the apex, linear, laterally compressed, 5–11.5 mm long.

Glumes. Glumes
similar. Lower glume lanceolate, membranous, keeled, 1-keeled, 1 -nerved. Upper
glume lanceolate, 3.5–4.5 mm long, membranous, keeled, 1-keeled, 1 -nerved.

Fertile lemma 2.5–3.3 mm long, keeled, 1–3 -nerved. Lemma apex muticous.
Lodicules present. Anthers 3.

: Australasia.

: Northern Territory, South Australia, Victoria.

: Central Australia North, Central
Australia South. South Australia:
Flinders Ranges, Northern Lofty, Murray,
Southern Lofty, South-eastern. Victoria:
Grampians, Midlands, Murray
Mallee, Riverina, Volcanic Plain, Wannon, Wimmera.

Distinguishing characters include rhizomatous and stoloniferous habit;
setaceous blades; loose florets, falling entire downwards; unequal glumes, long
relative to lemmas; persistent, dorsally rounded lemmas with short or absent
lateral nerves; palea with dividing body, smooth keels and relatively broad
flaps; stipitate caryopsis.

occurs N and NE of Adelaide in S.A.,
and in western Vic; introduced into N.T. near Alice
Springs and further N on Elkedra Stn. On cracking clays, alluvial
sandy loams, roadsides, in seasonally flooded floodplains, depressions in
plains, marsh margins, and river beds and levees.; flowers Apr., June, Aug.,
Oct.-Feb.; fruits Apr., June, Aug., Oct.-Feb.

AVH 2011


Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith